diff options
Diffstat (limited to 'libc-top-half/musl/src/conf/sysconf.c')
| -rw-r--r-- | libc-top-half/musl/src/conf/sysconf.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/conf/sysconf.c b/libc-top-half/musl/src/conf/sysconf.c new file mode 100644 index 0000000..c72174f --- /dev/null +++ b/libc-top-half/musl/src/conf/sysconf.c @@ -0,0 +1,282 @@ +#include <unistd.h> +#include <limits.h> +#include <errno.h> +#ifdef __wasilibc_unmodified_upstream // WASI has no process-level accounting +#include <sys/resource.h> +#endif +#ifdef __wasilibc_unmodified_upstream // WASI has no realtime signals +#include <signal.h> +#endif +#include <sys/sysinfo.h> +#ifdef __wasilibc_unmodified_upstream +#include "syscall.h" +#endif +#include "libc.h" + +#define JT(x) (-256|(x)) +#define VER JT(1) +#define JT_ARG_MAX JT(2) +#ifdef __wasilibc_unmodified_upstream // WASI has no mq +#define JT_MQ_PRIO_MAX JT(3) +#endif +#define JT_PAGE_SIZE JT(4) +#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores +#define JT_SEM_VALUE_MAX JT(5) +#endif +#define JT_NPROCESSORS_CONF JT(6) +#define JT_NPROCESSORS_ONLN JT(7) +#define JT_PHYS_PAGES JT(8) +#define JT_AVPHYS_PAGES JT(9) +#define JT_ZERO JT(10) +#define JT_DELAYTIMER_MAX JT(11) + +#define RLIM(x) (-32768|(RLIMIT_ ## x)) + +long sysconf(int name) +{ + static const short values[] = { + [_SC_ARG_MAX] = JT_ARG_MAX, +#ifdef __wasilibc_unmodified_upstream // WASI has no processes + [_SC_CHILD_MAX] = RLIM(NPROC), +#else + // Not supported on wasi. + [_SC_CHILD_MAX] = -1, +#endif + [_SC_CLK_TCK] = 100, + [_SC_NGROUPS_MAX] = 32, +#ifdef __wasilibc_unmodified_upstream // WASI has no rlimit + [_SC_OPEN_MAX] = RLIM(NOFILE), +#else + // Rlimit is not supported on wasi. + [_SC_OPEN_MAX] = -1, +#endif + + [_SC_STREAM_MAX] = -1, + [_SC_TZNAME_MAX] = TZNAME_MAX, + [_SC_JOB_CONTROL] = 1, + [_SC_SAVED_IDS] = 1, + [_SC_REALTIME_SIGNALS] = VER, + [_SC_PRIORITY_SCHEDULING] = -1, + [_SC_TIMERS] = VER, + [_SC_ASYNCHRONOUS_IO] = VER, + [_SC_PRIORITIZED_IO] = -1, + [_SC_SYNCHRONIZED_IO] = -1, + [_SC_FSYNC] = VER, + [_SC_MAPPED_FILES] = VER, + [_SC_MEMLOCK] = VER, + [_SC_MEMLOCK_RANGE] = VER, + [_SC_MEMORY_PROTECTION] = VER, + [_SC_MESSAGE_PASSING] = VER, + [_SC_SEMAPHORES] = VER, + [_SC_SHARED_MEMORY_OBJECTS] = VER, + [_SC_AIO_LISTIO_MAX] = -1, + [_SC_AIO_MAX] = -1, + [_SC_AIO_PRIO_DELTA_MAX] = JT_ZERO, /* ?? */ + [_SC_DELAYTIMER_MAX] = JT_DELAYTIMER_MAX, +#ifdef __wasilibc_unmodified_upstream // WASI has no mq + [_SC_MQ_OPEN_MAX] = -1, + [_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX, +#endif + [_SC_VERSION] = VER, + [_SC_PAGE_SIZE] = JT_PAGE_SIZE, +#ifdef __wasilibc_unmodified_upstream // WASI has no realtime signals + [_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3, +#else + // Not supported on wasi. + [_SC_RTSIG_MAX] = -1, +#endif +#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores + [_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX, + [_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX, +#else + [_SC_SEM_NSEMS_MAX] = -1, + [_SC_SEM_VALUE_MAX] = -1, +#endif + [_SC_SIGQUEUE_MAX] = -1, + [_SC_TIMER_MAX] = -1, +#ifdef __wasilibc_unmodified_upstream // WASI has no shell commands + [_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX, + [_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX, + [_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX, + [_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX, +#else + [_SC_BC_BASE_MAX] = -1, + [_SC_BC_DIM_MAX] = -1, + [_SC_BC_SCALE_MAX] = -1, + [_SC_BC_STRING_MAX] = -1, +#endif + [_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX, + [_SC_EXPR_NEST_MAX] = -1, + [_SC_LINE_MAX] = -1, + [_SC_RE_DUP_MAX] = RE_DUP_MAX, + [_SC_2_VERSION] = VER, + [_SC_2_C_BIND] = VER, + [_SC_2_C_DEV] = -1, + [_SC_2_FORT_DEV] = -1, + [_SC_2_FORT_RUN] = -1, + [_SC_2_SW_DEV] = -1, + [_SC_2_LOCALEDEF] = -1, + [_SC_IOV_MAX] = IOV_MAX, + [_SC_THREADS] = VER, + [_SC_THREAD_SAFE_FUNCTIONS] = VER, + [_SC_GETGR_R_SIZE_MAX] = -1, + [_SC_GETPW_R_SIZE_MAX] = -1, + [_SC_LOGIN_NAME_MAX] = 256, + [_SC_TTY_NAME_MAX] = TTY_NAME_MAX, +#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT) + [_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIONS, + [_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX, + [_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN, +#else + [_SC_THREAD_DESTRUCTOR_ITERATIONS] = -1, + [_SC_THREAD_KEYS_MAX] = -1, + [_SC_THREAD_STACK_MIN] = -1, +#endif + [_SC_THREAD_THREADS_MAX] = -1, + [_SC_THREAD_ATTR_STACKADDR] = VER, + [_SC_THREAD_ATTR_STACKSIZE] = VER, + [_SC_THREAD_PRIORITY_SCHEDULING] = VER, + [_SC_THREAD_PRIO_INHERIT] = -1, + [_SC_THREAD_PRIO_PROTECT] = -1, + [_SC_THREAD_PROCESS_SHARED] = VER, + [_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF, + [_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN, + [_SC_PHYS_PAGES] = JT_PHYS_PAGES, + [_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES, + [_SC_ATEXIT_MAX] = -1, + [_SC_PASS_MAX] = -1, + [_SC_XOPEN_VERSION] = _XOPEN_VERSION, + [_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION, + [_SC_XOPEN_UNIX] = 1, + [_SC_XOPEN_CRYPT] = -1, + [_SC_XOPEN_ENH_I18N] = 1, + [_SC_XOPEN_SHM] = 1, + [_SC_2_CHAR_TERM] = -1, + [_SC_2_UPE] = -1, + [_SC_XOPEN_XPG2] = -1, + [_SC_XOPEN_XPG3] = -1, + [_SC_XOPEN_XPG4] = -1, + [_SC_NZERO] = NZERO, + [_SC_XBS5_ILP32_OFF32] = -1, + [_SC_XBS5_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1, + [_SC_XBS5_LP64_OFF64] = sizeof(long)==8 ? 1 : -1, + [_SC_XBS5_LPBIG_OFFBIG] = -1, + [_SC_XOPEN_LEGACY] = -1, + [_SC_XOPEN_REALTIME] = -1, + [_SC_XOPEN_REALTIME_THREADS] = -1, + [_SC_ADVISORY_INFO] = VER, + [_SC_BARRIERS] = VER, + [_SC_CLOCK_SELECTION] = VER, + [_SC_CPUTIME] = VER, + [_SC_THREAD_CPUTIME] = VER, + [_SC_MONOTONIC_CLOCK] = VER, + [_SC_READER_WRITER_LOCKS] = VER, + [_SC_SPIN_LOCKS] = VER, + [_SC_REGEXP] = 1, + [_SC_SHELL] = 1, + [_SC_SPAWN] = VER, + [_SC_SPORADIC_SERVER] = -1, + [_SC_THREAD_SPORADIC_SERVER] = -1, + [_SC_TIMEOUTS] = VER, + [_SC_TYPED_MEMORY_OBJECTS] = -1, + [_SC_2_PBS] = -1, + [_SC_2_PBS_ACCOUNTING] = -1, + [_SC_2_PBS_LOCATE] = -1, + [_SC_2_PBS_MESSAGE] = -1, + [_SC_2_PBS_TRACK] = -1, + [_SC_SYMLOOP_MAX] = SYMLOOP_MAX, + [_SC_STREAMS] = JT_ZERO, + [_SC_2_PBS_CHECKPOINT] = -1, + [_SC_V6_ILP32_OFF32] = -1, + [_SC_V6_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1, + [_SC_V6_LP64_OFF64] = sizeof(long)==8 ? 1 : -1, + [_SC_V6_LPBIG_OFFBIG] = -1, + [_SC_HOST_NAME_MAX] = HOST_NAME_MAX, + [_SC_TRACE] = -1, + [_SC_TRACE_EVENT_FILTER] = -1, + [_SC_TRACE_INHERIT] = -1, + [_SC_TRACE_LOG] = -1, + + [_SC_IPV6] = VER, + [_SC_RAW_SOCKETS] = VER, + [_SC_V7_ILP32_OFF32] = -1, + [_SC_V7_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1, + [_SC_V7_LP64_OFF64] = sizeof(long)==8 ? 1 : -1, + [_SC_V7_LPBIG_OFFBIG] = -1, + [_SC_SS_REPL_MAX] = -1, + [_SC_TRACE_EVENT_NAME_MAX] = -1, + [_SC_TRACE_NAME_MAX] = -1, + [_SC_TRACE_SYS_MAX] = -1, + [_SC_TRACE_USER_EVENT_MAX] = -1, + [_SC_XOPEN_STREAMS] = JT_ZERO, + [_SC_THREAD_ROBUST_PRIO_INHERIT] = -1, + [_SC_THREAD_ROBUST_PRIO_PROTECT] = -1, + }; + + if (name >= sizeof(values)/sizeof(values[0]) || !values[name]) { + errno = EINVAL; + return -1; + } else if (values[name] >= -1) { + return values[name]; + } else if (values[name] < -256) { +#ifdef __wasilibc_unmodified_upstream // WASI has no getrlimit + struct rlimit lim; + getrlimit(values[name]&16383, &lim); + if (lim.rlim_cur == RLIM_INFINITY) + return -1; + return lim.rlim_cur > LONG_MAX ? LONG_MAX : lim.rlim_cur; +#else + // Not supported on wasi. + errno = EINVAL; + return -1; +#endif + } + + switch ((unsigned char)values[name]) { + case VER & 255: + return _POSIX_VERSION; + case JT_ARG_MAX & 255: + return ARG_MAX; +#ifdef __wasilibc_unmodified_upstream // WASI has no mq + case JT_MQ_PRIO_MAX & 255: + return MQ_PRIO_MAX; +#endif + case JT_PAGE_SIZE & 255: + return PAGE_SIZE; +#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores + case JT_SEM_VALUE_MAX & 255: + return SEM_VALUE_MAX; +#endif + case JT_DELAYTIMER_MAX & 255: + return DELAYTIMER_MAX; + case JT_NPROCESSORS_CONF & 255: + case JT_NPROCESSORS_ONLN & 255: ; +#ifdef __wasilibc_unmodified_upstream + unsigned char set[128] = {1}; + int i, cnt; + __syscall(SYS_sched_getaffinity, 0, sizeof set, set); + for (i=cnt=0; i<sizeof set; i++) + for (; set[i]; set[i]&=set[i]-1, cnt++); + return cnt; +#else + // WASI has no way to query the processor count + return 1; +#endif +#ifdef __wasilibc_unmodified_upstream // WASI has no sysinfo + case JT_PHYS_PAGES & 255: + case JT_AVPHYS_PAGES & 255: ; + unsigned long long mem; + struct sysinfo si; + __lsysinfo(&si); + if (!si.mem_unit) si.mem_unit = 1; + if (name==_SC_PHYS_PAGES) mem = si.totalram; + else mem = si.freeram + si.bufferram; + mem *= si.mem_unit; + mem /= PAGE_SIZE; + return (mem > LONG_MAX) ? LONG_MAX : mem; +#endif + case JT_ZERO & 255: + return 0; + } + return values[name]; +} |